Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor Guidescope (OTA Only)

BH #SKS11180 • MFR #S11180
Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor Guidescope (OTA Only)
Key Features
  • For Autoguiding, Imaging, Observation
  • 72mm Apochromatic Doublet Lens
  • 420mm Focal Length, f/5.8 Focal Ratio
  • Extra Low-Dispersion Lens Element
Use the Sky-Watcher Evostar ED APO 72mm f/5.8 Guidescope to improve the precision of your autoguiding system, for wide-field astrophotography with small CCD imagers, or as an exceptional grab-and-go option for fast observation sessions.
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Sky-Watcher Evostar Overview

  • 1Description
  • 2Uses
  • 3Optical Tube Assembly
  • 4Focuser
  • 5Mounting

Use the Sky-Watcher Evostar ED APO 72mm f/5.8 Guidescope to improve the precision of your autoguiding system, for wide-field astrophotography with small CCD imagers, or as an exceptional grab-and-go option for fast observation sessions.

The 72mm aperture is complemented by an extra low-dispersion (ED) element set in a doublet apochromatic lens design. These two optical features make the Evostar much more precise than standard refractors and guidescopes, producing crisp and clear high-resolution views with limited edge distortion and accurate color representation. To achieve the sharpest focus possible, Sky-Watcher utilizes a Crayford-style focuser. Unlike a conventional rack-and-pinion system, the focuser utilizes a toothless friction mechanism that smoothly moves the drawtube without the backlash that rack-and-pinion focusers suffer from. The focuser has a large 2" drawtube to accommodate full-frame imaging sensors without vignetting.

A mounting cradle-ring assembly clamps over the OTA and lets the user adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and to help with balancing, while avoiding interference with other equipment. The scope is offered without a mount or tripod, but a Vixen-style dovetail plate makes it compatible with any mount head with a Vixen-style saddle. To protect the optical tube and accessories during transport and storage, a hard aluminum carrying case is provided.

Uses
  • Autoguider scope: The optical performance improves the precision of autoguiding systems by being able to finely focus the field and resolve guide-stars better
  • Wide-field astrophotography: Using 2" or 1.25" imaging systems directly in the drawtube enables tack-sharp and highly resolved wide-field images of the night sky, galaxies, constellations, and other objects
  • Visual: Its optical performance, short focal length, and mounting rings make it an ideal fast grab-and-go option for planetary and lunar observation
Optical Tube Assembly
  • 72mm aperture is especially useful for lunar and planetary use
  • Short 420mm focal length helps to maintain a short form factor and produce a fast focal ratio
  • Fast f/5.8 focal ratio reduces the exposure times required during astrophotography to capture bright and clearly resolved images versus smaller optical systems
  • Apochromatic doublet lens design with an extra low-dispersion element eliminates chromatic and spherical aberrations for true color rendition and without distortion across the entire field of view
  • Hard aluminum carrying case
Focuser
  • Dual-speed Crayford-style
  • Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
  • Large 2" drawtube prevents vignetting when using wide-field eyepieces for viewing, or large imaging sensors for astrophotography
Mounting
  • OTA only, mount head and tripod required for proper use
  • Cradle-ring assembly for dovetail plate allows the scope orientation to be changed based on mount configuration
  • Vixen-style dovetail plate is compatible with any alt-az or equatorial mount with a Vixen-style saddle
  • Weight: 4.3 pounds
UPC: 050234111805

Sky-Watcher Evostar Specs

Packaging Info
Package Weight
11.25 lb
Box Dimensions (LxWxH)
23 x 14.5 x 10"

Sky-Watcher Evostar Reviews

See any errors on this page? Let us know

Can this telescope be mounted on a Sky-Watcher ...

Can this telescope be mounted on a Sky-Watcher Star Adventurer GTI Mount ?
Asked by: Nelson
The Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor Guidescope (OTA Only), will mount onto the Sky-Watcher Star Adventurer GTI Mount using a V-style dovetail,
Answered by: Lenny
Date published: 2023-08-19

Accessories for photography

Accessories for photography
Asked by: Anonymous
You will need Celestron SLR (35mm OR Digital) Camera Adapter for All Refractor and Reflector Telescopes which Accept 1.25" Eyepieces - Requires Camera-Specific T-Mount Adapter BH #CETA1.25 • MFR #93625 https://www.bhphotovideo.com/c/product/202135-REG/Celestron_93625_SLR_35mm_OR_Digital.html To attach to the scope. You will need a T-ring to attach to your camera. Those (2) pieces will screw together. You did not mention what camera you have in order to list the appropriate T-ring
Answered by: John
Date published: 2020-10-29

What accessory do I need to mount it on C11 OTA?

What accessory do I need to mount it on C11 OTA?
Asked by: Alexander
You would need this plate: https://bhpho.to/3oFrEmo In order to get the scope onto plate, please remove the Vixen style dovetail plate from the bottom of the mounting rings & mount the Losmandy DC11 dovetail plate in its place.
Answered by: Dan
Date published: 2020-10-29

Hi, what is the back focus distance of this ...

Hi, what is the back focus distance of this scope? I am using a canon mirrorless camera. Thanks!
Asked by: Denis
The Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor Guidescope (OTA Only) needs 55mm of back focus.
Answered by: Yaakov
Date published: 2022-09-09

Hello, can this equipment be used with ZWO ...

Hello, can this equipment be used with ZWO cameras? What accessories do you require? thanks
Asked by: Fabio
Theres No Such Thing As A 2 ZWO Camera.Only Adapters
Answered by: Jannie
Date published: 2022-12-03

what size filters does this scope use?

what size filters does this scope use?
Asked by: Lonnie
This is incorrect info from the B&H staff. After some learning on my part, you will need a 2" to 1.25" eyepiece adapter and then you can use 1.25" filters, eyepieces, etc. I wish I knew this when buying the scope so that I could have purchased everything at once.
Answered by: Daniel
Date published: 2022-12-03

What eye piece do i need if i want to connect my ...

What eye piece do i need if i want to connect my cellphone to this? it looks like the eye piece on this is 2 inches wide
Asked by: mike
Either a 2", or 1.26" Eyepiece Size will work. These Smartphone Adapters are fairly universal.
Answered by: Alex S
Date published: 2021-03-05

Can I use this as a telesope, or is it some kind ...

Can I use this as a telesope, or is it some kind of accessory?
Asked by: GB
The Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor Guidescope (OTA Only) can be used as a telescope too but most people are using it as a guidescope or for deep space imaging with a camera.
Answered by: Dan
Date published: 2023-08-16
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